Fuse Lenses for Electric Knoxville XL Plastic frame Plastic lens Non-polarized lenses Lens width: 61 millimeters Fuse Bronze Mirrored Tinted Lenses. Subtle Gold Metal Mirror Coating over a brown lens base. Brown view. Brown tint heightens color contrast. Enhanced depth perception. Non-polarized lenses Completely block harmful UV rays, providing 100% UV protection Fuse Force scratch resistant hard coating Lens Category 3, Ideal for Bright Light Custom Made to easily interchange with your current sunglasses.